Demountable sealed stovepipe joint



, Jan. 18, 1949. A HQLLUB 2,459,382

DEMOUNTABLE SEALED STOVE PIPE JOINT Filed Sept. 14, 1946' 2 Sheets-Sheet1 I/WE/VTOR ARTHUR H041 U5 Br 47 E Jan. 18, 1949. HOLLUB 2,459,382

DEMOUNTABLE SEALED STOVE PIPE JOINT Filed Sept. 14, 1946 i 2Sheets-Sheet 2 I/Vl/E/VTOH APT/7'01? HOLLUB Patented Jan. 18, 1949UNITED STATES PATENT OFFICE DEMOUNTABLE SEALED STOVEPIPE JOINTArthunHollub, Chicago, Ill. Application September 14, 1946, Serial No.697,070

My invention is directed to joint connections for sheet metal pipe andsheet metal tubing.

Presently known joints and methods of connecting sheet metal pipe suchas smoke pipe and air conduits principally comprises slipping a crimpedend of one pipe section in a smooth surfaced end of another section.This means of connection has various well known disadvantages such as(a) relatively rapid rusting and decay of the overlapped andfrictionally engaged portions; (12) sagging and poor support where thespan between points of support comprises more than two or three pipesections with resultant falling of the pipes; (c) thedifficult andlaborious cleaning of the pipes requiring their complete dismantling,removal and separation; (d) difiicult assembly due to irictionandinacces-.. sibility at various locations making correct and completefriction assembly virtually impossible; (e) the frequent cost ofreplacement and labor thereof; and (f) looseness of joints permittingleakage.

It is an object of my invention to provide :novel joints and sheet metalpipes containing joints which overcome these disadvantages and which areeasily assembled and disassembled either for cleaning or replacement;which provide great strength and provide for long spans of assembledsections without intermediate support; which provide sealed joints atthe junctures of pipe sections easily sealable by the average houseowner; and which provide a safe and more fireproofl channel for smokeand products ofcombustion.

A further object of my invention is the provision of joints for sheetmetal pipes, each of which include a pair of metal ring or. reinforcingapertured flange members mounted on 'adjacent ends of a pair of pipesectionsand which flange members are removably secured together by aplurality of bolts, and where the ends .of such pipe sections are inabutting. relation,

though not overlapped, and thereby providing for selectiveremoval of allconnecting bolts except two so as to permit a swinging or pivoting.

of one or more pipe sections out of alignment with the remainingsections which remaining sections need not be removed or dismantled toclean all of said pipe sections. it

A further object of my invention is the proviand having integralangularly bent edge flanges,

adapted to receive a sealing material, and-fan novel joints and A ingcompound or cement is placed and retained to efifectively seal thejoint.

Other and further important objects of my invention will be apparentfrom the following description and appended claims.

This invention (in an illustrative embodiment) is illustrated anddescribed in the following.

On the drawings:

Fig. 1 is an elevational view of an elbow section with two parts thereofseparated and with parts brokenaway. i

Fig. 2 is a partially cross sectional and partially plan view taken on aplane intersecting one of the connection joints.

Fig. 3 is a plan view showing one pipe section which has been unsecuredfrom between two sections with the exception of one bolt at each endthereof, and pivoted out of alignment to provide access to the group ofpipes.

Fig. 4 is a modified embodiment of my invention shown in cross sectiontwo sections of pipe secured inend to end relation.

Referring to Figs. 1 and 2, numeral I (I desigwhich in thisillustrationis shown as having one end formed at substantially a thirtydegree plane and having its separated angular edge bent radially andthence backwardly atanangle to form an integral right angled flange Hand. a continuing. angularly bent annular flange 12. The cross sectionof the separated. end portions of pipe sections I0 and I3 is the same asillustrated in the left hand section in Fig. 2, wherein correspondingparts bear similar numerals. The perpendicularly extending flanges Hhave a plurality of spaced holes therein, similar to. the one shown inFig. 2, and said holes are uniformly spaced so that they will registerand receive bolts l5 and so that elbow sections may be turned to formdifferent angles of the complete elbow.

Numeral l4 designates a metal band or collar having a perpendicularlyand radially extending edge flange 16 which terminates in an angularlybent edge flange I! which extends outwardly at an angle less than arightangle. Flanges l i andthe butt end of pipe section In abutstheflanged end of pipe section is as shown in Fig. 2.

The collar It has a plurality of spaced apart holes therein whichregister with corresponding holes punched in pipe section l and in whichare removably mounted sheet metal screws (9 which secure said collarupon its pipe section.

The edge of collar I i opposite to integral ilange I6 is bent or flaredoutwardly at an angle to form an annular flange 20 which forms a grooveorchannel with the exterior surface of the pipe section on which saidcollar is mounted and in which is pressed a mastic sealing compound orcement 22 which will be retained therein and efiectively seal the spacebetween the pipe and said collar.

In practice, each straight pipe section has one of the collars l4mounted on one end thereof and has on its opposite end contiguousannular flanges- H and [2. By punching the holes in flanges II and I6 atuniform distances, such holes may be easily aligned and bolts l securedin place, the assembler either adding one section at a time or boltingtogether a number thereof before mounting them in desired position.

In Fig. 1 I illustrate an elbow composedzof three angular pipe sectionsI'D, I3 and 2 I, the'outer. two of which each have one end carryingcontiguous flanges H and I2 and the intermediate section I3 having bothends having said flanges. The cementitious sealing compound or cement iseasily applied into the V-shaped groove or channel formed byeach pair ofadjacently positioned quires complete dismantling and removal of allpipes and remounting thereof; it: is an'advantage in employing my novelconstruction to remove all bolts of an intermediate section with excep--tion of two bolts at the lower'part thereof and thence rotate suchsection to permit inspection and access to both such pivoted section andto groups of adjacent pipe sections in the same aligned span. To remountsuch pivoted section, it is rotated back to original position andthebolts replaced and tightened: Similarly, an elbow may be eithercompletely or. partially removed by removal of bolts to permit access intwo series of pipes disposed at angles relative to eachrother.

In normal spans no wires or equivalent supporting means are needed in myconstruction due to its relatively greater-strength and resist'ance't'otransverse stresses. In abnormal span lengths,

suspension wires may be used and attached to the uppermost' of therespective bolts. l5. My construction is also satisfactorily adaptablefor air conduits, either hot air or air conditioning; and for gasconduits where low pressures prevail;

In Fig. 4' I illustrate a modified embodiment of with a removable masticcement or equivalent material to form sealing-gaskets or rings 21 and28.

Pipe sections (0 and I8 have holes therein positioned toregister withthe holes in collar 24 and removable screws 29 are mounted in saidholes. Said collar and sealed joint construction provide a strong andefiectively sealed joint which is easily removed to permit removal ofone or more pipe sections for cleanouts or for replacement.

I am aware that various changes may be made in the embodiment of theinvention herein specifically described without departing from orsacrificing any of the advantages ofthe invention or any featuresthereof, and nothing herein shall be construed as limitations upon theinvention, its concept or structural embodiment as to the whole or anypart thereof.

I claim:

1. A pipe joint adapted to connect the adjacent ends of two or more pipesections, an annular flange on one pipe section having a plurality ofspaced holes therein; a metal collar having outwardly bent flangesintegral with both its edges; said collar being securabl'e on an end ofa pipe, one of said collar flanges having spaced holes therein and beingbent at an angle to form a V-shapedgroove with said first mentionedflange; fastening. elements extending through the holes of said flanges;and a removable seal-- ing ring of mastic material in said groove.

21A pipe joint adapted to connect the adjacent ends of two or more pipesections; an annular angularly bent flange on. one pipe section;

a metal collar secured on the other of said pipe sections and having an:edge flange bent outwardly and thence ang-ularly over said collar; saidflanges providing a groove circmnferentially of said-joint; boltsextending through the radially extending portions of said flanges;. anda gasket removably mounted in said groove and sealing said joint.

p 3; A pipe joint adapted to connect the adjacentexids-of two or morepipe sections; an an nular angularly bent flange on one pipe section; ametal collar secured on the other of said pipe sections and having. anedge flange bent outwardly an'dth'ence angularly over said collar; anintegral" outwardly bent flange onthe other edge of said' collar;saidfirst mentioned flanges providing a groove therebetween; said secondflange on said collarproviding a groove between it and the pipe section;removable fastening elements securing said first mentioned flange andsaidcollar flange together; and removable gaskets mounted inboth saidgrooves.

4. A pipe joint adapted to connect the adjacent ends of two more pipesections, apertured annular flanges on the adjacent ends of saidsections}. each. of said annular flanges having integral edge flangesextending angularly over said pipe sections respectively and providing.a substantially V shaped groove the1ebetween;- a plurality of removableboltsin said flange apertures; a sealinggasket of mastic material insaid groove; the removal of all said bolts except two at opposite-endsof a pipe section permitting piv- Otin'g of said pipe sections toprovide for access toiinteriors thereof.

5. In an. adjustable elbow and pipe connection construction a pluralityof. pipe sections removably connected together to provide'an angularpassage; each of said pipesections having raangular flange integral withone edge of said collar; a pipe section abutting the collar-bearingsection; an angular flange integral with the end of said pipe sectionand forming a groove with said collar flange; a sealing, gasket in saidlast mentioned groove; said pipe section and said elbow sections beingseparately removable without dismantling of the remaining sections toerinit access to the remaining section.

6. In an adjustable, removable and replaceable joint for sheet metalpipes; a pair of sheet metal pipe sections in end abutting position; ametal collar secured on one of said sections; said collar having edgeflanges extending over said 001- lar-bearing pipe section; an aperturedannular flange on the other of said pipe sections and formin an annulargroove with one of said 001- lar flanges; a removable mastic sealingring in said annular groove; removable bolts securing said collar andsaid pipe section flange; a sealing ring between the other of saidcollar flanges and the collar-bearing pipe section; the removal of allbolts of two joints except two aligned bolts permitting a swinging of apipe section out of alignment to permit access into such pipe sections.

ARTHUR HOLLUB.

REFERENCES CITED

